Steam-turbine.



PATENTED MAY 30, 1905.

J. STUMPF.

STEAM TURBINE.

APPLICATION TILED SEPT.8, 190s. nzmnwzn 00T.19.1904.

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Wimesses:

UNITED STATES Patented May 30, 1905.

PATENT OEEIcE.

JOHANN STITUMPF, OF OIIARLOTTENBURG, GERMANY, ASSIONOR TO GENERALELECTRIC COMPANY, A CORPORATION OF NElV YORK.

STEAM-TURBINE.

SPECIFICATION forming part of Letters Patent No. 791,055, dated May 30,1905.

Application filed September 8, 1903. Renewed October 19, 1904. SerialNo. 229.110.

'0 (AU whom it may concern:

Be it known that I, JoHANN STUMPF, a subject of the King of Prussia,German Emperor, and a resident of 27 Rankestrasse, Oharlottenburg, nearBerlin, in the Kingdom of Prussia, German Empire, have invented certainnew and useful Improvements in Steam-Turbines, of which the following isan exact specification.

My invention relates to improvements in steam-turbines, and moreespecially to a steamturbine with two turbine-wheels situated one at theside of the other one, so that the steam can flow from one turbine-wheeldirectly into the other one without fixed leading vane-rims beingarranged between the turbine-wheels. In such turbines the primarywheelthat is, the wheel directly impinged upon by the freshsteam-naturally develops a greater power than the secondary wheel.Therefore these two turbines can advantageously be used for driving twomachines which require a different power as, for instance, twodynamo-machines of difierent size. In all steam -tur bines it is a greatadvantage to have the tur bine-wheels rotate in a horizontal directionthat is to say, to have the shafts of the turbine-wheels situated in thevertical direction. If by means of a steam-turbine two differentmachines shall be driven, it is naturally advantageous to arrange onemachine above the turbine-wheels and the other one below the same. Themachine situated below the turbine-wheels will advantageously besituated in the foundation of the turbine, and it has proved a greatdisadvantage that this machine is not sufficiently cooled. The uppermachine can be easily cooled on account of the same being free from allsides. Now in order to avoid a heating of the lower machine by the steamof the turbines and to effect acooling of the same I provide my presentinvention, which consists in arranging between the lower machine and theturbine-wheels a condenser.

In order to make my invention more clear, I refer to the accompanyingdrawing, which shows in a somewhat diagrammatic manner a verticalsection of a turbine constructed according to my invention.

In the example shown in the drawing a centrifugal condenser is shown;but it will be understood that any other suitable condenser may be used.

In the drawing, a is the turbine-casing, in which the turbine-wheels Land c are situated. The turbine-wheel b is fixed to a shaft (Z, and theturbine-wheel c is fixed to a shaft 6.

f represents the steam-admission nozzles, through which the steam flowsupon the turbine-wheel Z). After passing the vanes of this turbine-wheelthe steam flows into the vanes of the turbine-wheel c. The primarywheel?) naturally develops a greater power than the secondary wheel 0.It will be understood that the wheels 6 and c rotate in oppositedirections.

Above the turbine-casing a a machine to be driven is arranged. In theexample shown in the drawing a dynamo machine is to be driven, thearmature g of which is fixed to the shaft (Z. Below the turbine-casingct a smaller machine to be driven is situated. In the example shown inthe drawing this is also a dynamo-machine, the armature it of which isfixed to the shaft 6. It will be seen that this smaller dynamo-machineis situated perfectly in the foundation of the turbine.

c' is the impeller of a centrifugal condenser. This impeller is fixed tothe shaft 0. Around the impeller t' the fixed vane-rim 7a is situated.The cooling-water enters through pipes m. It will be understood thatinstead of these pipes any other convenient means may be provided forleading the water to the impeller. The steam in the turbine-casing (0comes naturally in contact with the water, condenses, and the condensedsteam is taken along by the water entering through the pipes or and isthrown out of the casing through the openings in the vane-rim Z2.

The condenser forms a partition between the turbine and the lowerdynamo-machine, which partition on account of being cooled by the wateravoids the detrimental effect of the heat of the turbine upon the lowermachine.

Having thus fully described the nature of this invention, what I desireto secure by'Letters Patent of the United States is 1. In asteam-turbine, the combination of two turbine-wheels rotating inopposite directions, a driven element connected with each wheel, meansfor admitting steam above said turbine-wheels, a casing inclosing saidturbine-wheels, an extension on said casing inclosing the driven elementbelow the wheels, and a condenser in said casing extending across thespace and forming a partition between the turbine-wheels and said lowerdriven element, substantially as described.

2. A turbine, comprising a casing, relatively rotating buckets andfluid-discharging devices, in combination with a support for theturbine, a driven element located below the casing and within thesupport, a second element also driven by and located above theturbine,and a condenser located between the exhaust side of the Wheel-bucketsand one of said elements.

3'. A turbine, comprising a casing, oppositely rotating bucket wheels,and nozzles which are common to the wheels, in combinascribingwitnesses.

. J OHANN STUMPF.

Witnesses:

HENRY HASPER, WoLDEMiAR HAUPT.

